Join Us — Octave Energy

Data Scientist

Are you an experienced data scientist? Do you know how to create reliable predictions and optimal decisions based on complex and large datasets? Do you want to put your talent to use and contribute to the energy transition by building innovative energy management solutions?

Your role

Probabilistic forecasting of electricity consumption and on-site generation at client premises — not only point forecasts, but the uncertainty estimates the control layer needs to make defensible decisions.
Turning forecasts into control actions: converting forecasts and price signals into dispatch decisions across our clients' assets — batteries, PV and EV charging — with a single objective, minimizing their energy bill. In practice this means formulating and solving a constrained optimisation problem over each site's tariff structure, capacity limits and asset behavior, and doing it well enough that the result holds up when the forecast turns out to be wrong.
Real-time execution, including control logic running on edge devices, that stays stable when conditions deviate from plan.
Closing the loop between prediction, decision and execution, so the system runs unattended and improves on its own operating history. In practice: tracking forecast error against realized load and generation to drive retraining; comparing the savings actually achieved against what the optimiser expected, and attributing the gap to the forecast, the formulation or the asset; and correcting our models of the assets themselves — round-trip efficiency, degradation, state-of-charge drift — against what the fleet really does.
R&D delivery: work alongside our Research Manager and top tier Research institutes on the data science workstreams of our ongoing research projects.

What we're looking for

Mathematical optimisation is essential for this role: linear and quadratic programming, mixed-integer formulations, and ideally stochastic programming. You should be comfortable moving from a business objective to a formulation, and from a formulation to something that solves reliably within an operational time budget.
A strong foundation in machine learning, time series forecasting and statistical modelling.
Practical experience with real-time control algorithms on edge devices — PID, rule-based supervisory control, MPC, or comparable approaches you have deployed and maintained in the field.
A problem solver by instinct: you're comfortable being handed an ambiguous situation, working out what's actually going on, and deciding what to do about it.
The ability to explain a complex model or control decision to a non-technical audience — colleagues in sales and operations, and clients who want to understand why their battery did what it did.
Commercial judgement: you can tell the difference between the solution that is optimal on paper and the one that goes live this quarter and starts paying for itself.
Fluency in Python.

A clear plus

Working knowledge of energy systems: electricity markets, load forecasting, asset dispatch, balancing mechanisms.
Experience with AI Coding.
Experience with AWS.
A track record with messy field data — gaps, drift, sensors that contradict one another.
Experience shipping models and controllers into production systems that run unattended, with monitoring in place. Notebooks are where the work starts, not where it ends.

What's in it for you

Hardware in the loop. Your algorithms don't stop at an API boundary. They move megawatts through equipment installed at real sites.
A short feedback loop. Models go live, are measured against real financial outcomes, and get improved. You'll know within days whether an idea worked.
Room to set the direction. The team is small enough that your decisions about modelling, tooling and control architecture become the way Octave.energy does it.
A mission with urgency. A renewable grid runs on flexibility: shifting demand towards the hours when the wind blows and the sun shines. Batteries, PV and EV charging are the three levers we pull, and better forecasting and control get more out of each of them.

We also offer

An attractive salary package
Offices in Mechelen and Brussels
Flexible hours and hybrid working (2–3 days in the office)
A collaborative team with genuine room to learn and grow in a fast-growing cleantech scale-up
An attractive benefits package: Car/mobility budget, hospitalization & group insurance, training budget, cafeteria plan with 13th-month optimization, €10/day of lunch vouchers, eco-cheques and extra benefits (e.g., gym subscription).

About Octave.energy

Founded in April 2020, Octave.energy is a Belgian cleantech company specialized in battery energy storage and energy management services for businesses. We have sold over 200 MWh of storage capacity and operate the largest fleet of behind-the-meter batteries in Belgium. Backed by private investors, imec, and the European Commission's EIC Accelerator, we work at the forefront of the energy transition.

Interested?

Send your CV to recruitment@octave.energy, along with a few lines about something you've built — a forecasting model, a controller you designed, a project that shows how you approach a problem. We'll get back to you shortly.

Research Project Manager

Are you a motivated project manager who enjoys turning research into structured projects with clear plans, timelines, and deliverables? Then join Octave.energy's mission to accelerate the energy transition by bringing smart energy storage and energy management solutions to the market.

Have a real impact and become part of a young and dynamic team in a fast-growing scale-up.

Your role

You will own Octave.energy's portfolio of research and innovation projects (Flemish, Belgian federal, and European funding) from application to closeout, and be the driving force behind new funding proposals. You keep these projects on track, on budget, and compliant with research objectives. You will be able to lean on the technical and product team for expertise and be the contact point with top-tier research institutes and universities.

You will be responsible for:

Owning subsidized projects end-to-end: planning, timelines, milestones, deliverables, and all reporting obligations towards funding bodies.
Driving new funding proposals: structuring the proposal, drafting the non-technical sections, and gathering and integrating technical input from the technical team.
Full administrative and financial ownership: tracking budgets, hours, and costs per project, and preparing/submitting the claims, justifications, and documentation needed for audits.
Scouting the funding pipeline: actively tracking open calls relevant to Octave.energy and proposing which ones to pursue to the management team.
Aligning with the technical team and product owner on research and project priorities, and coordinating with them to make sure technical deliverables and reports come in on time.

What we are looking for

1–3 years of experience in project management, project coordination, or grant/proposal administration.
Excellent writing skills; able to structure and edit long, technical documents even without being a technical expert yourself.
Highly organized and autonomous to be comfortable owning multiple projects and deadlines in parallel.
Prior knowledge of or interest in the energy industry (e.g. renewables, energy storage, energy management).
Strong communication skills; confident coordinating between founders, technical/product team, and external partners (universities, funding agencies), and comfortable chasing people for input.
Fluent in English. French and Dutch are a plus but not a requirement.

Nice to have:

Master's degree in the field of business or engineering, or equivalent level of experience.
Prior exposure to Flemish/Belgian or EU subsidy schemes (e.g., VLAIO, Innoviris, Horizon Europe, etc.).
Experience with research institutes or university collaborations.
Familiarity with project management tools and AI tools (e.g., ChatGPT, Claude, Copilot, etc.)

What's in it for you

An interesting and varied role at a fast-growing cleantech start-up, with real ownership over how Octave.energy's funding pipeline runs.

We also offer:

An attractive salary package.
Flexible working hours with hybrid working, ideally 2 days at our office in Mechelen and Brussels.
A supportive, collaborative team with strong learning and growth opportunities in a scale-up environment.

Why join Octave.energy

Founded in April 2020, Octave.energy is a Belgian cleantech company specialized in battery energy storage and energy management services for businesses. Octave.energy has sold over 200 MWh of battery energy storage capacity and operates the largest fleet of behind-the-meter batteries in Belgium. Backed by private investors, Imec, and the EIC Accelerator of the European Commission, Octave.energy is working on large-scale projects at the forefront of technology and sustainability.

How to apply

Interested in the role of Research Project Manager at Octave.energy? Send your CV and motivation letter to recruitment@octave.energy. We'll get back to you as soon as possible.

Business Developer - BESS (The Netherlands)

Do you want to help accelerate the Dutch energy transition and give Dutch businesses breathing room back on the electricity grid? Octave is expanding in the Netherlands and is looking for a driven Business Developer to build and grow our installer network. You'll be the engine behind our sales: you'll make sure installers confidently offer our batteries and Energy Management System to their end customers.

Your role

As a Business Developer – BESS, you'll work closely with, and report to, our Business Development Manager Netherlands, who launched the Dutch market. Together you'll build Octave into an established name in the Dutch battery energy storage market.

You identify, approach, and convince new installers and integrators to become Octave partners.
You build lasting relationships with installation partners and guide them through the entire partner journey, from first introduction to successful first projects.
You support installers both commercially and technically with questions from their end customers, including on grid congestion, connection capacity, peak shaving, and energy flexibility.
You provide commercial product trainings and demos on our battery systems and EMS, so partners can independently run strong sales conversations.
You attend relevant trade fairs, events, and networking opportunities in the Dutch energy sector.
You identify market needs, competitive insights, and product feedback, and feed them back to the commercial and technical teams.

Who are you?

You have at least 3 years of experience in B2B sales or business development, preferably in the energy sector, installation industry, or a technical environment. A network among small and medium-sized electrical installers is a plus!
You combine commercial drive with technical affinity: you can hold an informed conversation about battery storage, EMS, grid congestion, and energy markets, or you're willing to quickly get up to speed.
You have a true hunter mentality: you get energy from opening new accounts and convincing partners.
You're a natural relationship builder who not only wins over installers but also makes them successful.
You work independently, take initiative, and feel at home in a dynamic scale-up environment with short lines of communication.
You're willing to travel regularly within the Netherlands to visit installers and partners.
You're fluent in Dutch and can express yourself well in English.

Extra advantages

An existing network of installers, integrators, or EPC companies in the Netherlands.
Knowledge of the Dutch energy market: grid congestion issues, connection contracts, energy prices, and flexibility markets.
Experience with channel sales or building a partner network.
A technical education or background (electrical engineering, energy technology, or similar).

What do we offer you?

A key commercial role in growing a young, fast-growing market.
The opportunity to help build Octave's Dutch organization from an early stage, with real growth opportunities as the market grows.
A lot of autonomy and trust, with strong commercial and technical support from the Belgian team and direct guidance from our Business Development Manager Netherlands.
A competitive salary package, supplemented with a variable component.
Flexible working hours and hybrid work.
An open, collaborative culture with short decision-making lines.

Why Octave?

Octave is a Belgian cleantech scale-up, founded in 2020, specialized in battery energy storage and energy management for businesses. With more than 200 MWh of battery capacity, we manage one of the largest behind-the-meter battery fleets in Belgium and prove our technology works every day.

We are backed by private investors, imec, and the European Commission's EIC Accelerator Fund, and are building strong European growth. The Netherlands is one of our most important growth markets.

Interested?

Do you see yourself as the person who will build out Octave's installer network in the Netherlands?
Send your CV and a short motivation to recruitment@octave.energy.

EMS Business Development Manager

Octave.energy is a cleantech scale-up building energy management and storage solutions. We’re hiring a EMS Business Development Manager responsible for the sales and commercial track of our cutting-edge Energy Management System (EMS).

Your Role

EMS Business Development

Contribute to the EMS commercial strategy, identifying target markets, customer segments, sales channels, and growth opportunities.
Build and maintain strong relationships with key partners, including installers, integrators, energy suppliers and end customers.
Identify, negotiate, and develop strategic partnerships that accelerate the adoption and deployment of Octave's EMS solutions.

Revenue Growth

Drive revenue growth through effective sales, pricing, and market positioning strategies.
Develop and manage the EMS sales pipeline and business development activities.
Contribute to the commercial objectives, track performance, and continuously improve sales effectiveness.
Support partners throughout the sales process and help remove barriers to successful project delivery.

Market & Product Strategy

Contribute to the definition and evolution of Octave's EMS value proposition and go-to-market strategy.
Collaborate with the marketing team to promote Octave’s EMS solutions and strengthen Octave’s market presence.
Represent Octave.energy at industry events, trade fairs, and customer meetings.
Work closely with management team to align commercial activities with overall business strategies and provide inputs for product development.

Skillset

Strong business development, sales, or commercial experience in the energy field.
Proven track record of growing revenue and developing partnerships.
Strong commercial negotiation and stakeholder management skills.
Desire to work in a fast moving and entrepreneurial environment.
Fluent in Dutch and English. French is a plus.

With some (or all) of the following points, you have a clear plus

Master's degree in the field of economics or engineering, or equivalent level of experience.
Fluency using MS Excel and interest in AI tools.
Experience with Odoo is a nice to have.

What’s in it for you

An incredibly interesting and diverse job in a dynamic and fast-growing company. We offer the opportunity to further develop a marketing & sales approach for an innovative product and become a driving force in the transition to sustainable energy.

We also offer

An attractive salary package.
A nice office in Mechelen.
Flexible working hours with hybrid working (2–3 days in the office, 2–3 days remote).
A collaborative team environment with strong learning and growth opportunities in a fast-growing cleantech scale-up.

Why join Octave.energy

Founded in April 2020, Octave.energy is a Belgian cleantech company specialized in battery energy storage and energy management services for businesses. Octave.energy has sold over 180 MWh of battery energy storage capacity and operates the largest fleet of behind-the-meter batteries in Belgium. Backed by private investors, Imec, and the EIC Accelerator of the European Commission, Octave.energy is working on large-scale projects at the forefront of technology and sustainability.

How to apply

Interested in joining Octave.energy as an EMS Business Development Manager?

Send your CV to recruitment@octave.energy and we’ll get back to you as soon as possible.

Marketing Intern

Octave.energy is a cleantech scale-up on a mission to roll out cutting-edge energy management and storage solutions. We are looking for a driven marketing intern to support our Brand Manager and help build the visibility and brand of Octave.energy.

In this role, you will help ensure that Octave.energy stays top-of-mind with customers and partners, while actively contributing ideas on how we, as a growing company, remain relevant and visible in a rapidly evolving sector.

Open Application

Octave.energy believes in creativity, sustainability and entrepreneurship.

We're always looking for passionate people to join us on our journey. Open to a new challenge in a cleantech scale-up, but don’t see a vacancy that fits you? Feel free to send your CV and motivation letter to recruitment@octave.energy.

We’d love to hear from you!